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Iphen : a model for real time production of grapevine phenological maps
No full textIPHEN project is a co-operative effort for the production and broadcast of phenological maps for Italian area and involves several agro-meteorological services, university departments and research institutions. The project was based on a simulation model developed in order to produce fortnightly maps of phenological phases for two widespread grapevine varieties, the early one Chardonnay, and the late one Cabernet sauvignon.
The model was based on a simple and innovative method, founded on the summation of heating normal hours, instead of the classical growing degree days approach. Model operates on a highly detailed Digital Elevation Model, with pixel of 2 x 2 km. Thermal fields for maximum and minimum temperature were created applying specific geostatistical procedures to data acquired from the National Agrometeorological Network of CRA–UCEA. Calibration was carried out on bibliographic data coming from different regions of Italy. A standard routine to correct model results on the base of phenological data collected by a group of observers working on different parts of Italy was implemented. Final results were broadcasted on the Internet site www.ucea.it. Validation of model results, on the base of phenological data recorded in 2006, is presented and discussed. The choice of two phenologically extreme varieties was useful to describe spatial-temporal behavior of vine phenology in Italy. The robustness and the parsimony in therms of meteorological and phenological data requirements indicated that IPEN approach (i) could evolve to an operational service referred to single terroir, entire countries or the whole European area and (ii) could be conveniently applied to other grapes varieties, different crops or wild species
G. Del Monte, Testi dalla Babilonia Ellenistica, Volume 1 Testi Cronografìci (Studi Ellenistici IX), 1997
No full textJoannès Francis. G. Del Monte, Testi dalla Babilonia Ellenistica, Volume 1 Testi Cronografìci (Studi Ellenistici IX), 1997. In: Topoi, volume 9/1, 1999. pp. 389-391
Normalità e potenziale di fertilità: valutazioni diverse per una corretta lettura dell'esame seminale
No full textGoing Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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